diff --git a/core/src/identity/rsa.rs b/core/src/identity/rsa.rs
index d47bee87..1e20f72d 100644
--- a/core/src/identity/rsa.rs
+++ b/core/src/identity/rsa.rs
@@ -27,7 +27,6 @@ use ring::rand::SystemRandom;
 use ring::signature::{self, RsaKeyPair, RSA_PKCS1_SHA256, RSA_PKCS1_2048_8192_SHA256};
 use ring::signature::KeyPair;
 use std::sync::Arc;
-use untrusted::Input;
 use zeroize::Zeroize;
 
 /// An RSA keypair.
diff --git a/core/src/nodes/listeners.rs b/core/src/nodes/listeners.rs
index effcea65..f9c0f464 100644
--- a/core/src/nodes/listeners.rs
+++ b/core/src/nodes/listeners.rs
@@ -408,7 +408,7 @@ mod tests {
             .map_err(|(err, _)| err);
 
         let mut runtime = Runtime::new().unwrap();
-        runtime.block_on(future).unwrap();
+        let _ = runtime.block_on(future).unwrap();
     }
 
     #[test]
diff --git a/core/src/peer_id.rs b/core/src/peer_id.rs
index dd60c43d..d9dc34e1 100644
--- a/core/src/peer_id.rs
+++ b/core/src/peer_id.rs
@@ -219,7 +219,7 @@ impl Into<multihash::Multihash> for PeerId {
 quick_error! {
     #[derive(Debug)]
     pub enum ParseError {
-        B58(e: bs58::decode::DecodeError) {
+        B58(e: bs58::decode::Error) {
             display("base-58 decode error: {}", e)
             cause(e)
             from()
diff --git a/misc/multiaddr/src/errors.rs b/misc/multiaddr/src/errors.rs
index 4330226f..26363583 100644
--- a/misc/multiaddr/src/errors.rs
+++ b/misc/multiaddr/src/errors.rs
@@ -57,8 +57,8 @@ impl From<multihash::DecodeOwnedError> for Error {
     }
 }
 
-impl From<bs58::decode::DecodeError> for Error {
-    fn from(err: bs58::decode::DecodeError) -> Error {
+impl From<bs58::decode::Error> for Error {
+    fn from(err: bs58::decode::Error) -> Error {
         Error::ParsingError(err.into())
     }
 }
diff --git a/protocols/secio/src/exchange/impl_ring.rs b/protocols/secio/src/exchange/impl_ring.rs
index b95219fc..04acf866 100644
--- a/protocols/secio/src/exchange/impl_ring.rs
+++ b/protocols/secio/src/exchange/impl_ring.rs
@@ -25,7 +25,6 @@ use futures::{future, prelude::*};
 use log::debug;
 use ring::agreement as ring_agreement;
 use ring::rand as ring_rand;
-use untrusted::Input as UntrustedInput;
 
 impl Into<&'static ring_agreement::Algorithm> for KeyAgreement {
     #[inline]